Because the “search” requires you to find a card with certain characteristics, you don’t have to find the card if you don’t want to.

6/14/2019

If an effect refers to a “[subtype] spell” or “[subtype] card,” it refers only to a spell or card that has that subtype. For example, Goblin War Party is a card that references and creates Goblins, but it isn’t a Goblin card.